Dynamo-electric machine



C. E. WILSON. DYNAMO ELECTRIC MACHINE. APPLICATION FILED MAY 4, 1

Patented Nov. 16, 1920.

INVENTOR Charles E. Wilson. BY W W ATTORNEY WITNESSES UNITED STATES PATENT OFFICE.

CHARLES E. WILSON, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR T0 WESTING- HOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVANIA.

DYNAMIC-ELECTRIC MACHINE. 1,358,809. Specification of Letters Patent. t t d N0 1 Application filed May 4, 1916. Serial No. 95,315. T 0 allwhom it may concern: by means of dowel pins 8. The end brack- Be it known that 1, CHARLES E. vVILsON, ets 6 and 7 are held in place by studs 9 a citizen of the United States, and a resident which have a screw-threaded engagement, at of WVilkinsburg, in the county of Allegheny one end, with the end bracket 6 and are and State of Pennsylvania, have invented provided, at the other end with suitable a new and useful Improvement in Dynamonuts 10.

Electric Machines, of which the following In the construction of dynamo-electric is a'specification. machines similar to that shown and de- My invention relates to dynamo-electric scribed, iron or steel pipe of the desired machines, and it has for its object to prodiameter and of a suitable thickness is emvide a machine that is simple in construcployed in constructing the field-magnet tion and economical in manufacture. frames. This pipe may be such as is manu- In the manufacture of dynamo-electric factured by the usual processes for making machines, ithas been the usual practice to it seamless or substantially so. The pipe is construct the field-magnet. frames either by fed to a machine of the type known as the casting them or by welding bars of steel or full automatic turret machine which operwrought iron into suitable ringshaped ates automatically to machine the interior members. These processes are comparaand exterior surfaces of the pipe to retively expensive because of the large amount move irregularities of surface or dimension of time and labor involved. and to cut the pipe into sections of the According to the present invention, 1 length desired. The ends of the sections utilize iron or steel pipe of cylindrical shape are properly machined in order that end that is cut into sections of suitable lengths plates or brackets may be secured thereto. for field-magnet frames of dynamo-electric All of the above operations are performed machines by means of automatic machines. without removing the material from the The pipe is machined upon its exterior and machine. The pipe sections are then prointerior surfaces, cut into proper lengths vided with radially extending holes through and arranged to receive end brackets upon which screws or bolts may be inserted to seits end portions without removing it from cure the pole pieces in position. This operathe machine. 7 tion is preferably performed by a gang drill Pole pieces for the field-magnet frame which drills all of the holes simultaneously. are formed by rolling a bar of iron or steel The pole pieces are constructed by first in a cold state into such shape thatits cross rolling a rod of steel or iron in a cold state section is suitable for pole pieces. he ro into such shape that the cross section of the is 'then cut into desiredlengths and the pole rod is suitable for the desired purpose. The pieces are attached to the cylindrical frames. rod is then cut into sections of suitable The details of my invention will be delength and each section is provided with 'scribed'fi'ri connection with the accompanying hole corresponding to those in the field drawings in which Figure 1 is an end view, magnet yokes. The field magnet coils (not partially in elevation and partiallyfin secshown) are placed upon the pole pieces and tion, of a dynamo-electric machine conthe latter are firmly secured to the field structed in accordance with my invention. magnet yoke by means of the screws 4.

Fig. 2 is a view, in longitudinal section, The armature 5 is next placed in position taken on line 1I-II of Fig. 1, of the mechaand the end brackets 6 and 7 are placed 1n nism of Fig. 1, the armature being removed position at the respective ends of the fielde .forthe'sake of clearness. magnet frame. The studs 9 are then in- A dynamo-electric machine 1 comprises a serted through holes in the end brackets cylindrical field-magnet yoke 2 to which are 7 to engage the end bracket 6, and the bracksecured' pole pieces 3 The pole pieces 3, ets 6 and 7 are firmly clamped together by which are, for example, four in number, are means of the nuts 10. The dowel p ns 8, secured "to the field-magnet frame 2 by which have a tight or dr ving fit within the means of suitable bolts or screws 4. The holes provided for them n the ends of the armature 5 is rotatably supported by end fieldrmagnet. frame, register with correbrackets 6 and 7 that are prevented from sponding holes in the end brackets 6 and 7 to'prevent relative movement between these.

rotating relatively to the field-magnet frame parts. A pin 11, Which projects radially outwardly from the side of the dynamoelectric machine, is provided in order that vent its rotation relatively support, such as, for example, a bracket or cradle upon the chassis or engine of an automobile.

By means of -the above described method of constructing ynamo-electric dynamo-electric machines in accordance with the usual practices. A large amount of labor is avoided by the use of machines which automatically perform the greater part of the operations necessary to construct the field-magnet frames.

claim as my invention: 1. The method of manufacturing fieldmagnet frames for dynamo-electric chines WhlCl'l consists in machining the mterlor and exterior surfaces of a cylindrical yokes.

pipe, cutting the pipe into sections of lengths suitable for field-magnet yokes, preparing the ends of said sections to receive end plates and securing pole pieces to said field-magnet CHARLES WILSON. 

